Metal-turning machine.



No. 673,406. Patented May 7, I901.

J. MIDBOE, 1n. METAL TURNING MACHINE.

(Application filed on. 25, 1900. (No Model.) I 2 Sheets8hee l.

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No. 673,406.' v Patented May 7, l90l.

J. MIDBGE, 1n.

METAL TURNING MACHINE.

(Application fil'ed Oct. 25, 1900.] (No Model.) 2 Sheets-Sheet 2.

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Attorneys.

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UNITED STATES PATENT OFFICE.

JOHAN MIDBoE, JR., or STAVANGER, NORWAY.

METAL-TURNING MACHlNE.

SPECIFICATION forming part of Letters Patent No. 673,406, dated May 7,1901. Application filed October 25, 1900. Serial No. 34,240. (No model.)

To all whowt it may concern:

Be it known that I, J OHAN MIDBGE, J r., a subject of the King of Swedenand Norway, and a resident of Stavanger, Norway, have invented certainnew and useful Improve-- ments in Metal-Turning Machines, of which thefollowing is a specification.

My invention relates to improvements in machines for turning.

The invention consists, essentially, in the special arrangement by whichthe movement or guiding of the tool is efiected from the model ortemplet serving as the model from which the object is to be formed.

In the accompanying drawings, Figure 1 is an end view of a turning-lathehaving my improvements applied thereto. Fig. 2 is a plan view, and Fig.3 is a side view thereof.

Upon the frame or foot 1 of the lathe is mounted in the usual manner thespindle 7, with its face-plate 2.

3 is the tool-holder, with the usual adj usting-screws 4 and 5 for thetool 6.

X is the templetor model in conformity with which the work is to bemachined. In the drawings I have shown as an example a rectangular blockwith rounded edges as the work to be machined.

The model X is rotated from the spindle 7 through the medium of suitablegearing, as indicated by dotted lines in Fig. 1, and the tool is guidedby the model by the following arrangementthat is to say, a sliding spindle 8, which is provided with conical ends and can be movedlongitudinally backward and forward in the bearing 9, is arranged withone end bearing against the model X and the other against a double armor lever 10, which oscillates on pivots 11. The upper arm of the leverbears against a spindle or rod 12, one end of which can slidelongitudinally in the bearing 13 and the other end of which is rigidlyconnected with the sliding tool-holder 3, this movement beingcounteracted by a spring 15, placed between the toolholder and a screwedspindle 14. When the model X is rotated by the spindle 7, together withthe face-plate, the spindle 8 will by reason of the pressure of thespring 15 always bear against the periphery of the model and follow thesaid periphery during the rotation of the model, whereby the tool 6 willhave imparted to it a corresponding longitudinal movement to and fromthe work Y, which is thus machined in such a manner that it receives ashape corresponding to that of the model X.

The pivots 11 for the lever 10 can be raised or lowered by the screwedspindles 16, on which the bearings 11 are mounted. These spindles can beturned by the bevel-wheels 17 17 from the handle 18, as shown in thedrawings, or they can be connected by suitable gearing with the adjusting-screw 5 of the tool-holder. By this adjustment of the lever 10the movement transmitted from the model X to the work Y can be madegreater or smaller, so that varying dimensions can be given to the workY.

Instead of the spring 15 weights or other similar arrangements can beused. Furthermore, by varying the gearing between the spindle 7 and themodel X it will be understood that shapes can be given to the work Yquite different from that of the model.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

In combination, the rotating model, the sliding piece bearing againstthe same, the twoarmed pivoted lever having one arm contacting with saidsliding piece, a tool-holder having a rod contacting with the oppositearm of said lever and pressed normally toward the same, and meanst'orshifting said lever with relation to said rod and sliding piece,substantially as described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

JOHAN MIDBOE, JR.

Witnesses:

KATHINKA PAiiLssEN, AXEL LAHN.

